package Java_API;

import java.util.Scanner;

public class Java01 {
    public static void main(String[] args) {

//        int[][] arr = {{12,13,14},{15,16},{17,18,19,20}};
//        for (int i = 0; i < arr.length ; i++) {
//            for (int j =0; j<arr.length;j++){
//                System.out.println(arr[i][j]);
//
//            }
//        }
        System.out.println("--------欢迎使用图书管理系统-----");
        System.out.println("1、登录");
        System.out.println("2、注册");
        System.out.println("3、查看");
        System.out.println("0、退出");
        System.out.println("-----------------------------");
        System.out.println("请选择功能");
        Scanner sc = new Scanner(System.in);
        String option = sc.next();
        switch (option){
            //case 1:
                //break;
        }


    }
}
